package com.lxb.blog.web.admin;

import com.lxb.blog.entity.Tag;
import com.lxb.blog.entity.Type;
import com.lxb.blog.service.TagService;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.domain.Pageable;
import org.springframework.data.domain.Sort;
import org.springframework.data.web.PageableDefault;
import org.springframework.stereotype.Controller;
import org.springframework.ui.Model;
import org.springframework.validation.BindingResult;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.PathVariable;
import org.springframework.web.bind.annotation.PostMapping;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.servlet.mvc.support.RedirectAttributes;

import javax.validation.Valid;

@Controller
@RequestMapping("/admin")
public class TagController {

    @Autowired
    private TagService tagService;

    @GetMapping("/tags")
    public String tag(@PageableDefault(size = 5,sort = {"id"},direction = Sort.Direction.DESC)
                                  Pageable pageable,
                      Model model){
        model.addAttribute("page",tagService.listTag(pageable));
        return "admin/tags";
    }

    /**
     * 新增页面
     * @return
     */
    @GetMapping("/tags/input")
    public String input(Model model){
        model.addAttribute("tag",new Tag());
        return "admin/tags-input";
    }

    /**
     * 新增
     * @param tag
     * @param result
     * @param attributes
     * @return
     */
    @PostMapping("/tags")
    public String post(@Valid Tag tag, BindingResult result, RedirectAttributes attributes){
        //检验前端传的tag
        if(result.hasErrors()){
            attributes.addFlashAttribute("message","输入异常");
            return "redirect:/admin/tags";
        }
        Tag t = tagService.getTagByname(tag.getName());
        if(t != null){
            attributes.addFlashAttribute("message","不能重复添加标签");
            return "redirect:/admin/tags";
        }
        Tag tag1 = tagService.saveTag(tag);
        if(tag1 == null){
            attributes.addFlashAttribute("message","新增失败");
            return "redirect:/admin/tags";
        }
        attributes.addFlashAttribute("message","新增成功");
        return "redirect:/admin/tags";
    }

    /**
     * 更新页面
     * @return
     */
    @GetMapping("/tags/{id}/input")
    public String updateInput(@PathVariable Integer id,Model model){
        model.addAttribute("tag",tagService.getTag(id));
        return "admin/tags-input";
    }

    /**
     * 更新
     * @param id
     * @return
     */
    @PostMapping("/tags/{id}")
    public String update(Tag tag,@PathVariable Integer id,RedirectAttributes attributes){
        if(id ==null || tag == null){
            attributes.addFlashAttribute("message","请联系开发人员");
            return "redirect:/admin/tags";
        }
        Tag t = tagService.getTagByname(tag.getName());
        if(t != null){
            attributes.addFlashAttribute("message","不能重复添加标签");
            return "redirect:/admin/tags";
        }
        Tag tag1 = tagService.updateTag(id,tag);
        if(tag1 == null){
            attributes.addFlashAttribute("message","更新失败");
            return "redirect:/admin/tags";
        }
        attributes.addFlashAttribute("message","更新成功");
        return "redirect:/admin/tags";

    }

    /**
     * 删除
     * @param id
     * @param attributes
     * @return
     */
    @GetMapping("/tags/{id}/delete")
    public  String delete(@PathVariable Integer id,RedirectAttributes attributes){
        if(id == null){
            attributes.addFlashAttribute("message","请联系开发人员");
            return "redirect:/admin/tags";
        }
        try{
            tagService.deleteTga(id);
        }
        catch(Exception e){
            attributes.addFlashAttribute("message","博客中存在该标签，删除失败！");
            return "redirect:/admin/tags";
        }

        attributes.addFlashAttribute("message","删除成功");
        return "redirect:/admin/tags";
    }
}
